Задача 31642.

A square contour with a side of 10 cm along which a current of 50 A flows flows freely in a one-dimensional magnetic field of 10 mT. Determine the change in the potential energy of the contour when rotating about an axis lying in the contour plane by an angle of 180 °.

A detailed solution with a brief description of the condition, formulas and laws used in the solution, the derivation of the calculation formula and the answer.
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